GSplus - RetroBIOS¶
Technical notes
Fork of KEGS (Kent's Emulated GS) by digarok. Cross-platform Apple IIGS emulator supporting ROM 01 (128K), ROM 03 (256K), and Apple //e (32K) ROMs. ROM version determined by file size at load time.
Batocera configgen (gsplusGenerator.py) sets g_cfg_rom_path to bios/ROM.03 by default (configurable via gsplus_bios_filename system setting).
Built-in Disk II controller PROM derived via XOR diffs from main ROM. Built-in HD SmartPort PROM (slot 7) hardcoded in source. Built-in character font (kegsfont.h), optional ROMX-compatible charrom loadable via config UI.
2 files | 1 required, 1 optional | 2 in repo, 0 missing | 1 with HLE fallback
ROM required in repo
Apple IIGS system ROM
- Aliases:
ROM.01,ROM.03,APPLE2GS.ROM,APPLE2GS.ROM2,xgs.rom,XGS.ROM,Rom03gd,342-0077-b - Validation: size
- Source:
gsplus/src/config.c:131,gsplus/src/config.c:403-406,gsplus/src/config.c:1092-1149 - Accepted sizes: 32768 (Apple //e), 131072 (ROM 01), 262144 (ROM 03)
c600.rom optional in repo HLE fallback
Disk II controller PROM (slot 6)
- Size: 256 B
- Aliases:
controller.rom,disk.rom,DISK.ROM,diskII.prom - Validation: size
- Source:
gsplus/src/config.c:414-415,gsplus/src/config.c:1168-1220 - Built-in PROM generated from XOR diffs against main ROM
Generated on 2026-08-23T16:12:06Z